Winter Squash Casserole

3 C winter squash, cooked and mashed
1/4 C butter
3 lrg eggs
1 C sugar
1/2 tsp maple flavoring

Place in buttered 9X13 pan

Topping:
1/2 C brown sugar
1/4 C butter, soft
2 Tb. flour

Sprinkle topping on top of squash.  Bake at 350 for 1 hr.